gudusoft.gsqlparser.resolver2.scope

Class ListBasedScope

Object

gudusoft.gsqlparser.resolver2.scope.AbstractScope

gudusoft.gsqlparser.resolver2.scope.ListBasedScope

All Implemented Interfaces:

IScope

Direct Known Subclasses:

CTEScope, FromScope, JoinScope

public abstract class ListBasedScope
extends AbstractScope

Base class for scopes that manage a list of child namespaces. Used for FROM clauses, which contain multiple tables/subqueries. Key features: 1. Maintains ordered list of children 2. Resolves names by searching through children 3. Supports aliases

Field Summary

Fields

Modifier and Type	Field and Description
protected List<ScopeChild>	children Child namespaces in this scope

Fields inherited from class gudusoft.gsqlparser.resolver2.scope.AbstractScope

node, parent, scopeType

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ListBasedScope(IScope parent, TParseTreeNode node, ScopeType scopeType)

Method Summary

Modifier and Type	Method and Description
void	addChild(INamespace namespace, String alias, boolean nullable) Default implementation: not supported (most scopes don't have children)
List<ScopeChild>	getChildren() Default implementation: empty list
List<INamespace>	getVisibleNamespaces() Default implementation: delegate to parent
void	resolve(List<String> names, INameMatcher matcher, boolean deep, IResolved resolved) Default implementation: delegate to parent
protected void	resolveInNamespace(INamespace namespace, boolean nullable, List<String> remainingNames, INameMatcher matcher, ResolvePath path, IResolved resolved) Resolve remaining name parts within a namespace.
INamespace	resolveTable(String tableName) Default implementation: delegate to parent
String	toString()

Methods inherited from class gudusoft.gsqlparser.resolver2.scope.AbstractScope

fullyQualify, getNode, getParent, getScopeType, isWithin

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

children

protected final List<ScopeChild> children

Child namespaces in this scope

Constructor Detail

ListBasedScope

protected ListBasedScope(IScope parent,
                         TParseTreeNode node,
                         ScopeType scopeType)

Method Detail

addChild

public void addChild(INamespace namespace,
                     String alias,
                     boolean nullable)

Description copied from class: AbstractScope

Default implementation: not supported (most scopes don't have children)

Specified by:

addChild in interface IScope

Overrides:

addChild in class AbstractScope

Parameters:

namespace - The namespace to add

alias - The alias for this namespace

nullable - Whether this namespace is nullable (e.g., RIGHT side of LEFT JOIN)

getChildren

public List<ScopeChild> getChildren()

Description copied from class: AbstractScope

Default implementation: empty list

Specified by:

getChildren in interface IScope

Overrides:

getChildren in class AbstractScope

Returns:

List of scope children

resolveTable

public INamespace resolveTable(String tableName)

Description copied from class: AbstractScope

Default implementation: delegate to parent

Specified by:

resolveTable in interface IScope

Overrides:

resolveTable in class AbstractScope

Parameters:

tableName - Table name or alias

Returns:

Namespace if found, null otherwise

resolve

public void resolve(List<String> names,
                    INameMatcher matcher,
                    boolean deep,
                    IResolved resolved)

Description copied from class: AbstractScope

Default implementation: delegate to parent

Specified by:

resolve in interface IScope

Overrides:

resolve in class AbstractScope

Parameters:

names - Name parts (e.g., ["schema", "table", "column"])

matcher - Name matcher for case sensitivity rules

deep - Whether to recursively resolve into record fields

resolved - Callback to collect all matches

resolveInNamespace

protected void resolveInNamespace(INamespace namespace,
                                  boolean nullable,
                                  List<String> remainingNames,
                                  INameMatcher matcher,
                                  ResolvePath path,
                                  IResolved resolved)

Resolve remaining name parts within a namespace. For example, if we found table "t" and need to resolve "t.col1", this method handles resolving "col1" within table t.

getVisibleNamespaces

public List<INamespace> getVisibleNamespaces()

Description copied from class: AbstractScope

Default implementation: delegate to parent

Specified by:

getVisibleNamespaces in interface IScope

Overrides:

getVisibleNamespaces in class AbstractScope

Returns:

List of visible namespaces

toString

public String toString()

Overrides:

toString in class AbstractScope